メタデータ
| 項目 |
値 |
| Designation |
C/1970 N1 (Abe) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1970-10-20T16:46:43.086720Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:19Z |
| Obs used |
271 |
| NEO |
- |
| M1 |
6.600 |
| K1 |
4.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1970-10-11.0000000 |
| e |
1.00003692 |
| q (au) |
1.112541 |
| a (au) |
-30136.217151 |
| i (deg) |
126.719910 |
| Ω (om, deg) |
21.701358 |
| ω (w, deg) |
96.583364 |
| M (ma, deg) |
-0.000002 |
等級
散乱 + 全体線形
$$
M_a = (5.447 + 3.246\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
5.447 |
| n |
3.246 |
| gf |
0.800 |
| gb |
-0.948 |
| k |
0.999 |
| δ90 |
1.000 |
| パラメータ |
記号 |
範囲 |
説明 |
| 太陽・地球距離が1 AUのときの絶対等級 |
H0 |
-5 to 20 |
彗星の固有の明るさ |
| 測光スロープパラメータ |
n |
2 to 6 |
太陽距離に対する明るさ変化率 |
| 前方散乱非対称係数 |
gf |
0.8 to 1 |
前方散乱の強さ |
| 後方散乱非対称係数 |
gb |
-1 to -0.5 |
後方散乱の強さ |
| 分配係数 |
k |
0.8 to 1 |
前方/後方散乱の寄与比 |
| ダスト/ガス明るさ比 |
δ90 |
1 to 10 |
ダスト散乱とガス放射の相対寄与 |
参考: EPSC-DPS2025-160
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) |
終了日 (UTC) |
a |
b |
| 1970-07-05 |
1970-10-20 |
+1.2370 |
-0.055 |
| 1970-10-20 |
1971-03-07 |
-0.0609 |
-0.277 |
| 1971-03-07 |
1971-05-25 |
+5.0362 |
-1.623 |
log10 r = log10(太陽距離/AU)、Δ = 地球距離(AU)
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
07:29:43.33 |
-31:24:15.1 |
HIP 36362 |
8.77 |
| 2026-06-01 12:00 |
07:29:44.56 |
-31:24:05.2 |
HIP 36362 |
9.07 |
| 2026-06-02 00:00 |
07:29:45.80 |
-31:23:55.5 |
HIP 36362 |
9.38 |
| 2026-06-02 12:00 |
07:29:47.04 |
-31:23:45.9 |
HIP 36362 |
9.68 |
| 2026-06-03 00:00 |
07:29:48.30 |
-31:23:36.5 |
HIP 36362 |
9.99 |
| 2026-06-03 12:00 |
07:29:49.57 |
-31:23:27.1 |
HIP 36362 |
10.30 |
| 2026-06-04 00:00 |
07:29:50.84 |
-31:23:17.9 |
HIP 36362 |
10.61 |
| 2026-06-04 12:00 |
07:29:52.12 |
-31:23:08.8 |
HIP 36362 |
10.92 |
| 2026-06-05 00:00 |
07:29:53.42 |
-31:22:59.8 |
HIP 36362 |
11.23 |
| 2026-06-05 12:00 |
07:29:54.71 |
-31:22:51.0 |
HIP 36362 |
11.55 |
| 2026-06-06 00:00 |
07:29:56.02 |
-31:22:42.3 |
HIP 36362 |
11.86 |
| 2026-06-06 12:00 |
07:29:57.34 |
-31:22:33.7 |
HIP 36362 |
12.17 |
| 2026-06-07 00:00 |
07:29:58.66 |
-31:22:25.3 |
HIP 36362 |
12.49 |
| 2026-06-07 12:00 |
07:30:00.00 |
-31:22:16.9 |
HIP 36362 |
12.81 |
| 2026-06-08 00:00 |
07:30:01.33 |
-31:22:08.7 |
HIP 36362 |
13.12 |
| 2026-06-08 12:00 |
07:30:02.68 |
-31:22:00.7 |
HIP 36362 |
13.44 |
| 2026-06-09 00:00 |
07:30:04.03 |
-31:21:52.7 |
HIP 36362 |
13.76 |
| 2026-06-09 12:00 |
07:30:05.39 |
-31:21:44.9 |
HIP 36362 |
14.08 |
| 2026-06-10 00:00 |
07:30:06.76 |
-31:21:37.3 |
HIP 36362 |
14.39 |
| 2026-06-10 12:00 |
07:30:08.14 |
-31:21:29.7 |
HIP 36362 |
14.71 |
| 2026-06-11 00:00 |
07:30:09.52 |
-31:21:22.3 |
HIP 36362 |
15.03 |
| 2026-06-11 12:00 |
07:30:10.91 |
-31:21:15.0 |
HIP 36568 |
14.76 |
| 2026-06-12 00:00 |
07:30:12.31 |
-31:21:07.9 |
HIP 36568 |
14.49 |
| 2026-06-12 12:00 |
07:30:13.72 |
-31:21:00.9 |
HIP 36568 |
14.21 |
| 2026-06-13 00:00 |
07:30:15.13 |
-31:20:54.0 |
HIP 36568 |
13.94 |
| 2026-06-13 12:00 |
07:30:16.55 |
-31:20:47.3 |
HIP 36568 |
13.66 |
| 2026-06-14 00:00 |
07:30:17.97 |
-31:20:40.7 |
HIP 36568 |
13.39 |
| 2026-06-14 12:00 |
07:30:19.40 |
-31:20:34.3 |
HIP 36568 |
13.11 |
| 2026-06-15 00:00 |
07:30:20.84 |
-31:20:27.9 |
HIP 36568 |
12.84 |
| 2026-06-15 12:00 |
07:30:22.29 |
-31:20:21.7 |
HIP 36568 |
12.56 |
| 2026-06-16 00:00 |
07:30:23.74 |
-31:20:15.7 |
HIP 36568 |
12.29 |
| 2026-06-16 12:00 |
07:30:25.19 |
-31:20:09.8 |
HIP 36568 |
12.02 |
| 2026-06-17 00:00 |
07:30:26.66 |
-31:20:04.0 |
HIP 36568 |
11.74 |
| 2026-06-17 12:00 |
07:30:28.12 |
-31:19:58.4 |
HIP 36568 |
11.47 |
| 2026-06-18 00:00 |
07:30:29.60 |
-31:19:52.9 |
HIP 36568 |
11.20 |
| 2026-06-18 12:00 |
07:30:31.08 |
-31:19:47.6 |
HIP 36568 |
10.94 |
| 2026-06-19 00:00 |
07:30:32.56 |
-31:19:42.4 |
HIP 36568 |
10.67 |
| 2026-06-19 12:00 |
07:30:34.05 |
-31:19:37.3 |
HIP 36568 |
10.40 |
| 2026-06-20 00:00 |
07:30:35.55 |
-31:19:32.4 |
HIP 36568 |
10.14 |
| 2026-06-20 12:00 |
07:30:37.05 |
-31:19:27.6 |
HIP 36568 |
9.88 |
| 2026-06-21 00:00 |
07:30:38.55 |
-31:19:22.9 |
HIP 36568 |
9.62 |
| 2026-06-21 12:00 |
07:30:40.07 |
-31:19:18.4 |
HIP 36568 |
9.36 |
| 2026-06-22 00:00 |
07:30:41.58 |
-31:19:14.1 |
HIP 36568 |
9.11 |